a(n) = numerator(Sum_{k=1..n} d(k)/d(k+1)), where d is the number of divisors function.

Terms

a(0) =1a(1) =3a(2) =13a(3) =11a(4) =25a(5) =37a(6) =20a(7) =8a(8) =35a(9) =43a(10) =133a(11) =169a(12) =175a(13) =187a(14) =983a(15) =1133a(16) =1153a(17) =1333a(18) =451a(19) =481a(20) =501a(21) =541a(22) =273a(23) =899a(24) =1843a(25) =1903a(26) =1943a(27) =2123a(28) =1069a(29) =1189